What these performances have in common - in addition to the fact that none of these guys had been among weekly fantasy leaders before Week 7 - is that match-ups, and how coaches reacted to them, played a significant role.

Tebow went up against one of the worst teams in the NFL - winless Miami - in a match-up made in heaven. And he looked beaten by Miami's middling defense for three quarters.

Tebow should have excelled with this match-up. He didn't, but because of the finish, he came out a hero.

I have been bullish on Tebow recently, but Week 7's performance has me a little more concerned now than I had been before about a Week 8 match-up against Detroit, which has a psycho defense, and other upcoming match-ups against Oakland and Kansas City.

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DeMarco Murray reeled off his monster game against the worst rushing defense in the NFL - St. Louis. It was the best possible match-up he could have had, and it got better when RB mate Tashard Choice was injured during the game. Dallas coaches decided to play the match-up for all it was worth, and kept Murray heavily involved until late in the game when he appeared to run out of gas.

Murray will have another decent match-up against Philadelphia this week, but Dallas probably will have to throw more, unless they can keep Philadelphia's offense on ice.

And after Week 8, things could get murky for Murray because Felix Jones will be returning from injury and he'll have to share.

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Plaxico Burress' big game was an example of a coach playing against a match-up.

Not surprisingly, it was Jets coach Rex Ryan, who responded to Burress' plea for more attention by having him factor into end-zone pass plays against San Diego, which has one of the best pass defenses in the NFL. The Chargers appeared caught off guard.

All of this is not to say these guys won't continue to come up big, but it's a reminder of how week-to-week match-ups can play a big role in what otherwise seem like surprise performances.